demoralise vs vitiate

demoralise and vitiate both are verbs.

Word	Noun	Adjective	Verb	Adverb
demoralise	No	No	Yes	No
vitiate	No	No	Yes	No

As verbs, demoralise and vitiate are synonyms defined as:

demoralise and vitiate: corrupt morally or by intemperance or sensuality

Other synonyms of demoralise include corrupt, debase, debauch, demoralize, deprave, misdirect, pervert, profane, subvert.

demoralise (verb)	vitiate (verb)
lower someone's spirits; make downhearted	take away the legal force of or render ineffective
corrupt morally or by intemperance or sensuality	make imperfect
	corrupt morally or by intemperance or sensuality